Photoelectric surface, photoelectric conversion tube, image intensifier, and photomultiplier tube
AssigneeHamamatsu Photonics K.K.
InventorTatsuo Sasaki
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Abstract
The present invention improves sensitivity of the ultraviolet band of a photoelectric surface. A photoelectric surface includes a window material that transmits ultraviolet rays, a conductive film that is formed on the window material and has conductivity, an intermediate film 4 that is formed on the conductive film and is formed of MgF2, and a photoelectric conversion film that is formed on the intermediate film 4 and is formed of CsTe. Since the photoelectric surface includes the intermediate film 4 formed of MgF2, the sensitivity of the ultraviolet band is improved.
Claims8
A photoelectric surface having a laminated structure, the photoelectric surface comprising:
- a window material that transmits ultraviolet rays;
- a conductive film that is formed on the window material and has conductivity;
- an intermediate film that is formed on the conductive film and includes a compound of magnesium and fluorine;
- and
- a photoelectric conversion film that is formed on the intermediate film and includes tellurium and an alkali metal, wherein the photoelectric conversion film receives light that has passed through the window material, the conductive film, and the intermediate film, in order, and generates photoelectrons,
- wherein the intermediate film has a thickness selected from the range of 0.5 nm to 5.0 nm based on a wavelength of the ultraviolet rays and to cause the photoelectrons generated by the photoelectric conversion film to have a guantum efficiency of 20% or more relative to the ultraviolet rays transmitted by the window material.
Dependencies are inferred from the claim text.